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[ 26 ] 
A new species of Talinum, with single axillary flowers, was found for 
the first time in the Jornada, but was again collected further south, to¬ 
wards Chihuahua. Dalea lanata, Centaurea americdna, Sapindus mar - 
ginata , and a Bolivaria , probably identical with a new Texan species, 
brought to mind the flora of Arkansas and Texas, while the gigantic 
Echinocactus Wislizeni, ri reminds us v again that we are approaching the 
Mexic 
m 2 fe 
wv- 
ter petiolatis repando-dentatis, racemo umbelliformi, demum laxo elongato; 
pedicellis eglandulosis, horizontalibus, flore longioribus, sepali§ calycis 
aperti patulis; petalis (albis) obovatis, unguiculatis basi dilatata sub-cor- 
, dati$; stigmate cordatoconico; siliculis basi profundius emarginatis. v 
Common in sandy soil near Val verde and Fray Cristobal, north, of the 
Jornada del Muerto; flowers in July. Plant about 1 foot high, annual or 
biennial; leaves ovate-lanceolate, attenuate,.in the short petioles, closely 
resembling those of some species of Gaura; pedicells filiform, longer than 
the flower or fruit; flowers white^ about 3 lines in diameter, open; petals; 
obovate, with a long and distinct claw, which is widened at base; fila¬ 
ments also thickened at base; ovary tomdhtose* style hardly visible, more 
distinct in the fruit, which is 5 to 6 lines in transverse diameter, and 
~ about half as much from base to top; the valves appear to be closed at 
jtheir attachment to the subulate solid dissepiment. 
Dithyrea californica, Harv., pedicellis basi bi-glandulosis horizontalibus, 
flore multo brevioribus; sepaiis calcycis cylindrici clausi erectis; petalis 
(amreis T) linbari-spathulatis; stigmate bilobo; siliculis apice profundius 
' emarginatis. r 
Easily distinguished by the characters just enumerated from the New 
Mexican plant; though the difference in calyx and stigma will hot permit 
a generic separation. 
Ili siz 
5 to C 
can c 
and ] 
tlfls { 
^i Fr 
dried 
milla 
Kwt 
ns, 
the first they are gradually developed during the whole season. Plant 1£ 
to 4 feet high; oval, with a smaller diameter. Areolae 6 to 9 lines long. 
only 6 lines distant from one another; radial spines 1^ to 2 inches long; 
straight central ones 1 f- to % and large hooked ones 2 to 2\ inches long 
the ] 
|v In 
then 
'sts ci 
stem 
one 
■high 
dime 
of £ 
flov 
ras, 
1 ^Echinocactus Wislizeni, n. sp., gjgantehs, vertice villoso-tomentpso; 
costis .... acutis crenatis; areolis ojblongjs, approximate, junioribus fulvo- 
tomentosis;' aculeis radialibus flavis, demnm cinereis, porrectis; lateralibus 
sub 15 setaceis elongatis laeviusculis, summis infimisque 5-6 brevioribus 
robustioribps, annulatis; centralibus rubellis annulatis, 3 rectis sursum 
versisy 1 infgriore robustissimo, supra piano, apice reflexo-hamato; floribus. 
sub verticalibus, ovario et tubo brevi campanulato sepaiis imbricatis, auri- 
culato-cordatis 60-80 stipato; sepaiis interioribus 25-30 ovatis obtusis; 
petalis lanceolatis mucronatis, crenulatis; stylo supra stamina numerosissi- 
ma brevia longe exserto; stigmaflbus filifomflbus 18-20 erectis; bacca 
ovata, lignosa, imbricato-squamosa. 
Near Donana, collected in August with buds, open flowers, young and 
ripe fruits on the; same specimen. It belongs therefore to those Echino- 
cacti which flower through the whole season, like E. setispinus , Engelm., 
(in Plant. Lindh.) of Texas, while others are in flower only during a week 
or two in spring, *e. g. E. texensis, ’ Hpfr. In the latter, the young 
bunches of spines, together with the flower buds in their axills, come out 
at once in spring, and none more are formed during the season, while in 
